Fuel-oil burner



FUEL OIL*k BURNER Original/Filed Jl'l'ly 18.y 1924 2 Sheets-Sheet 2 Patented Jan. 6, 1931 UNITED STATES PATENT OFFICE LEE S. CHADWICK, OF SHAKER HEIGHTS VILLAGE, MARC RESEK, OF CLIEIVITIJAKINDv HEIGHTS, AND JOHN ALGER DAHLSTROM, OF EAST CLEVELAND, OHIO, ASSIGNORS TO PERFECTION STOVE COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO FUEL-OIL BURNER Original application. led July 18, 1924, Serial No. 726,657. Divided and this application led February Y f 25, 1927. Serial'No. 170,835.

This application is a divisionvof our former application Serial No. 726,657 filed July 18, 1924, that matured into Patent N o. 1,688,448 on October 23, 1928, and, like the earlier case, has general reference to fuel oil burning apparatus of the class involving an injector burner that is suitably supplied with fuel oil, and a steam generator subjected to a source of heat-as to the burner liame, and wherein the iiame ofthe burner is governed by controlling the amount of heatA delivef ed to the generator.

According to the invention that constitutes the subject of the present application, the amount of heat delivered to the generator is controlled by moving the generator bodily toward and from the source of heat, as to- Ward and from the burner iame; and the general objects are to provide a highly eiicient and thoroughly reliable apparatus of the aforesaidclass that is compact, and is suitable for use with hot air furnaces, steam boilers, forges, japanning and enameling ovens andthe like; to providefuel oil burning apparatus of the class referred Vto that is comparatively simple of-constructiom is economical of manufacture and which may be readily installed in furnaces, boilers, ovens and the like, of prevailing types; and toprovide a fuel oil burning apparatus of the principle above mentioned that is automatic in maintaining a substantially constant flameor one ofv a given range of variation-and which involves an adjustment whereby the llame-or its range of variation-may be changed.

More specific objects are t0 provide a support for the generator that is of such nature as will insure freedom of movement so that the generator is sensitive to the moving inuence of the actuating medium; and to pro.

vide simple mechanism that is convenient of manipulation for changing the mean or average relation of the generator to the source of heat. y

The objects above set forth, with others hereinafter appearing, are attained in the construction lillustrated in the accompanying drawings wherein Fig. l is a sectional side elevation, and Fig. 2 a front elevation of van embodiment of the invention.

As previously mentioned, the invention is applicable to various types of furnaces orv likeistructures, and, in Fig. 1, the front Wall ofsuch a structure is represented by a plate that is designated A. It'willbe understood from this that the space inside or to the rear of this wall or plate', and in which space the fuel oil burning apparatus is located, constitutes the combustion chamber or iirebox of the furnace or the like.

kThe fuel oil burning apparatus incorporates a hollow casing 1 that is flanged at its forward end and connected to the front plate A, the forward end of said casing being open and registering with an4 opening a 1n the front plate that is covered` by a suitable clo-` sure 2. The casing involves a partition 3 which divides its interior into compartments 4 and 5. A combustion chamber 6, preferably constructed of suitable, refractory ma rearwardly from the front plate A is a water receptacle 16 which receives its supplly of Water through a pipe 17 (Fig. 2). T e entrance of water to the receptacle 16 is con- `troll'edby a valve 18 that is adapted to be closed by mechanism involving afloat 19 when the` water within the receptaclehas attained a given level. A steam generator20 is supported by aims 21 above the combustion V chamber 6, the top wall of the combustion .chamber having an'opening 22 directly above which the generator is normally posltioned. The arms 21 extend downwardl alon the opposite sides of the casing 1 an have ife edge bearings 23 that rest in V-notches formed in brackets 24 that extend downwardlv and outwardly'from the casing 1. At theirlower v the latter.

ends, the arms 21 have extensions 25 which carry a cross beam 26. Threaded vertically through the middle of the cross beam is a screw 27 to the upper end of which is applied a cu 28 thatreceives a stud 29 depending from a bellows 30. This bellows is housed within a cylindrical cavity 31 formed in the bot-tom wallof the casing 1 and the bellows communicates through a pipe 32 with the receptacle 16. The lower portions of the receptacle 16 and the generator 20 are lconnected through a flexible conduit 34, While the tops of the vessels are connected through a similar conduit 35. A pipe 36 leads from a part of the latter conduit adjacent the receptacle 16 to the steam nozzle 10 of the burner 8.

To the lower end of the previously mentioned screw 27 is secured a bevel pinion 38 which meshes with a similar pinion 39 on `a shaft 40, said shaft being journaled in opposed branches of a U-shaped bracket 41 that is carried by the screw 27. The shaft 40 extends through a slot a in the front plate A and to its forward end is secured a hand wheel 42.

To start the apparatus in operation itis necessary to heat thegenerator 2O by suitable means, as by a torch, a pilot light or starting burner` or oil pan. These being common eXpedients, illustration is deemed' unnecessary. lVhen steam pressure is created within the generator 20 it is communicated through the pipes 35 and 36 to the nozzle 1() of the burner. The steam issuing from this nozzle sucks oil from the jet 11 and atomizes it and the resultant mixture of steam and oil burns within the combustion chamber 6, the products passing through the opening 22 about the generator 20 thus increasing the steam pressure within the generator. The increased pressure now prevailing in the generator is communicated through the pipe 35 to the upper portion of the receptacle 16. and the pressure in the receptacle is transmitted, through the water therein and that within the pipe 32, to the bellows 30, expanding 0r -elongating'the'bellows and depressing the beam 26. i As the beam is depressed, the arms 21 will be rocked in a direction to swing the generator 20 out of the direct path of the flame and away from the zone of intense heat. As a' consequence the steam pressure 'will fall within the system and the flamewill decrease in volume. Accordingly the temperature of the parts will fall and the steam pressure subside, allowing the bellows 30 to contract or shorten with the result that the generator will be returned to its former position. Thepromptness with which the fire responds to the different positions of the generator is enhanced by the changing water level in the generator due to the raising and lowering of For example, as the generator rises and the relative water level therein lowers the steam space increases and the steam pressure falls, immediately reducing the flame of the burner. The conditions are, of course, reversed on a lowering of the generator. j

To regulate the average temperature of the fire, the screw 27 may be adjusted by turning the hand wheel 42 to change the relation between the beam 26 and the bellows 30. This will cause the generator 2O to be shifted with respect to the combustion chamber and consequently will alter lthe conditions which are responsible for the character of the flame.

Having thus described our invention, what we claim is:

1.` In apparat-us of the character set forth, the combination of an injector burner, a steam generator movable up and down toward and from a source of heat, water supply means having a substantially constant water level and communicating with the generator in such manner as to effect substantially the same water level in the latter, the generator tending to move by gravity in the latter of the aforesaid directions, flexible connections throughwhich steam is conducted from the generator to the burner, means for supplying oil to the burner, and pressure operated means subjected to the steam pressure in the generator for moving the generator inthe other of the aforesaid directions.4 j v `2; In apparatus of the character set forth, the combination of an injector burner, a steam generator movable up and down toward andfrom a source of heat and from which generator the burner receives its steam supply. water supply means having a substantially constant water level and communieating with the generator in such manner as to effectsubstantially the same water level inv the latter means Ifor supplying oil to the burner, pressurev operated means subjected to the steam pressure in the generator, and adjustable connections between the last mentioned means and the generator, said pressure operated means serving to effect movemeut of the generator as aforesaid thereby to alter its elevation with respect to the aforesaid water level and 4vary the steam pressure delivered to the burner.

3. In apparatus of the character set forth, the combination of an injector burner, a pivotally supported element, a steam generator bodily carried by theelement and sustained thereby in operative relation to a source of heat, water supply means having a substantially constant Water level and communicating with the generator in such manner as vto effect substantially the same water level in the latter, the generator being moved up and down toward and from said source by the rocking of said element upon its pivot, flexible connections through which steam is conducted from the generator to the burner,

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means for supplying oil to the burner, pressure operated means subjected to the steam pressure in the generator, and conections between the last mentioned means and the aforesaid element whereby the element is adapted to .be swung on its pivot by said means.

4. In apparatus of the character set forth.

' the combination of a structure including a combustion chamber,'an injector burner arranged to discharge its products into said chamber, an element pivotally vsupported by the structure to swing on a horizontal axis adjacent the combustion chamber, alsteam generator bodily carried by said element above the combustion chamber so as to receive heat therefrom, water supply means having a substantially constant Water level and communicating with the generator in such manner as to effect substantially the same Water level in the latter, pressure operated means subjected to the steam pressure in the generator, and` operative connections between the last mentioned means and said element.

5. In apparatus of the characterset forth` the combination of a structure including a combustion chamber, an injector burner arranged to discharge its products into said chamber, an element pivotally supported by the structure to swing on a horizontal axis below the combustion chamber, a steam generator bodily, carried by said element above the combustion chamber to receive heat therefrom, water supply means having a substantially constant water level and communlcating kwith the generator in such manner as to effect substantially the same water level in the latter, pressure operated means subjected to the steam pressure in the generator, and adjustable connections between the last mentioned means and said element.

6. In apparatus of the character set forth, the combination of an injector burner, a steam generator exposed to a source of heat, a conduit leading from the steam generator tothe burner, means for conducting fuel oil to the burner, means for varying the amount of heat delivered to the generator and for changing the water. level in the generator Athereby to control the` steam pressure delivered to the burner, and means operated by the steam pressure in the generator for ac-l tuating the last mentioned means.

7. In apparatus of the character set forth, the combination of ank injector burner, a steam generator exposed to a source of heat, a conduit leading from the steam generator to the burner, means for conducting fuel oil to the burner, a Water receptacle, means for maintaining a substantially constant Water level within said receptacle, a conduit through which water gravitates from said receptacle to the generator, and means for raising and lowering the generator toward and from the source of heat thereby to conthe combination of a vessel, means for suppljging water thereto, means maintaininga su stantially constant Water level in the vessel, a steam generator supported for movement toward and from a source of heat, connections through which the interior of the vessel above and below the Water level there-V of communicates with the top and bottom portions of the generator, an injector burner, connections through which steam is conducted from the generator to the burner, means for supplying oil to the burner, and pressure operated means subjected to the steam pressure in the generator for moving the generator away from the source of heat as the steam pressure increases, as and for the purpose specified.

9. In apparatus of the character set forth, the combination of an injector burner having a fixed position, a steam generator for supplying steam to the burner, iexible communicative connections between the generator and the burner, a source of water supply having a substantially constant level, a flexible conduit for deliveringwa'ter from said source to the generator, the generator being -so related to said source as to'have a water level in common therewith, means supporting the generator for substantially vertical movement toward and from the zone of inj tense heat of the burner iame, and means for supplying oil to the burner.

10. In apparatus of the character set forth,

the combination of an injector burner having a fixed position, a steam `generator for supplying steam to the burner, fiexible communicative connections between the generator and the burner, a source of water supply -having a substantially constant level, a fiexible conduit for delivering water from said source to the generator, the generator being so related to said source as to have a water level in common therewith, means supporting the generator for substantially vertical movement toward and from the zone of intense Vheat of the burner flame, means for supplying oil to the burner, and pressure operated means subjected to the steam pressure in the generator for effecting movement of the generator as aforesaid thereby to vary the steam pressure delivered to the burner. In testimony whereof, we hereunto affix our signatures.

LEE S. CHADWICK.

MARC RESEK.

JOHN ALGER DAHLSTROM. 

